Adding a new MH light

[masonicman]

I just got my hands on a 175W small MH light. I want to run this light in conjunction with my existing 360W PC lights. I run my lights 10:30AM til 8:00PM. Actinic on first then daylight and vice versus for off. When and how long should I run this new MH light?

 

[BangkokMatt]

Start off at about 5-6 hours then add 30 mins a week until you reach your desired 'on time'. I run MH for 8 1/2 hours a day but anywhere between 8 - 12 hours will be ok